// CLI 命令实现（占位）
#include <iostream>
#include <string>
#include <fstream>

namespace aicompiler {

// 读取文件内容
std::string readFile(const std::string& path) {
    std::ifstream file(path);
    if (!file.is_open()) {
        std::cerr << "Error: Cannot open file " << path << std::endl;
        return "";
    }
    return std::string((std::istreambuf_iterator<char>(file)),
                       std::istreambuf_iterator<char>());
}

// ingest 命令：解析并验证 MLIR 输入
int cmdIngest(const std::string& input_file) {
    std::cout << "[ingest] Reading " << input_file << std::endl;
    
    auto content = readFile(input_file);
    if (content.empty()) {
        return 1;
    }
    
    std::cout << "[ingest] File size: " << content.size() << " bytes" << std::endl;
    
    // TODO: 实际解析 MLIR
    // auto module = mlir::parseSourceFile(input_file, &context);
    // if (!module) return 1;
    // if (failed(mlir::verify(*module))) return 1;
    
    std::cout << "[ingest] Success (stub)" << std::endl;
    return 0;
}

// opt 命令：应用优化 Pass
int cmdOpt(const std::string& input_file, const std::string& output_file) {
    std::cout << "[opt] Optimizing " << input_file << " -> " << output_file << std::endl;
    
    // TODO: 实际应用 Pass
    // mlir::PassManager pm(&context);
    // pm.addPass(createTaskAwarePartitioningPass());
    // pm.addPass(createLoopDistributionPass());
    // pm.run(module);
    
    std::cout << "[opt] Success (stub)" << std::endl;
    return 0;
}

// lower 命令：降低到目标后端
int cmdLower(const std::string& input_file, const std::string& target, 
             const std::string& output_file) {
    std::cout << "[lower] Lowering " << input_file << " to " << target 
              << " -> " << output_file << std::endl;
    
    // TODO: 实际降低
    // if (target == "cpu") {
    //     pm.addPass(createArefLoweringPass(Target::CPU));
    //     pm.addPass(createConvertToLLVMPass());
    // } else if (target == "spirv") {
    //     pm.addPass(createArefLoweringPass(Target::SPIRV));
    //     pm.addPass(createConvertToSPIRVPass());
    // }
    
    std::cout << "[lower] Success (stub)" << std::endl;
    return 0;
}

// codegen 命令：生成可执行文件
int cmdCodegen(const std::string& input_file, const std::string& output_file) {
    std::cout << "[codegen] Generating " << input_file << " -> " << output_file << std::endl;
    
    // TODO: 实际代码生成
    // llvm::TargetMachine->addPassesToEmitFile(...)
    
    std::cout << "[codegen] Success (stub)" << std::endl;
    return 0;
}

// run 命令：运行可执行文件
int cmdRun(const std::string& executable) {
    std::cout << "[run] Executing " << executable << std::endl;
    
    // TODO: 实际执行
    // aic_rt_init();
    // aic_rt_submit_cpu();
    // aic_rt_shutdown();
    
    std::cout << "[run] Success (stub)" << std::endl;
    return 0;
}

} // namespace aicompiler
